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A pilot on a space ship moving at 0.86c away from the Earth sends a laser beam signal to Earth. (a) The pilot measures the speed v of the laser beam signal to be (A) v (C) v > c. (b) The people on Earth measure the speed y of the laser to be (A) v (C) v > c.

```
5 years ago

Navjyot Kalra
654 Points
```							(a)The correct option is (B) v = c.A pilot on a space ship moving at 0.86c away from the Earth sends a laser beam signal to Earth. Light wave is an electromagnetic wave. Its value will be same irrespective of the frame reference. Therefore the pilot measures the speed v of the laser beam signal to be equal to the speed of light c. From the above observation we conclude that, option (B) is correct.(b)The correct option is (B) v = c.A pilot on a space ship moving at 0.86c away from the Earth sends a laser beam signal to Earth. Light wave is an electromagnetic wave. Its value will be same irrespective of the frame reference. Therefore, the people on Earth measure the speed v of the laser beam signal to be equal to the speed of light c. From the above observation we conclude that, option (B) is correct.
```
5 years ago
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### Course Features

• 110 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions